Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d2f2c7c397f7ef…

MALICIOUS

PDF

74.0 KB Created: 2020-12-25 21:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9fa6907fc36a6299e818fbd52abef45a SHA-1: 9bdcfa75dfb875d6b914c2fe4d8bde9d777592ce SHA-256: b3d2f2c7c397f7ef48a6078ceb93766c9633496ff4aa965af876b10e8880d59e
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, including one to 'trafficel.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/strik?utm_term=free+bingo+caller+app+for+ipad PDF link annotation
    • https://bujerawesu.weebly.com/uploads/1/3/4/4/134438781/joboravefev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5fd0f47a67be5.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/mavaramofapegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_5fb49e3eb6117.pdfIn PDF document text
    • https://tuxilumamiwuwuw.weebly.com/uploads/1/3/4/5/134582020/1742951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5fa35e1cddb90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_5fb37647f010c.pdfIn PDF document text
    • https://mesobesin.weebly.com/uploads/1/3/4/5/134590010/3805128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/lukabitemotisenajatijo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/4005058458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eeffd9a-11c6-4de9-a04b-c4f84bf9ffbd/zededefudodupimima.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/jsc_result_2018_marksheet_published.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/oriental_vehicle_insurance_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/6549547326.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/50019591814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c89a78-f4dd-449b-be89-de607194d377/taking_care_of_baby_games_download_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 5240 bytes
SHA-256: 784ee6962464484b92209bfcd3cadd8d37a555d30d6512f3c337778f01a82ca3
font_01_sfnt_off0000f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 10524 bytes
SHA-256: 655ec3dae65b7d6d3ff554f3249a5aee5ba4b9af2c0b4dd8e1d45c04659afb74

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